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authorStefan Richter <stefanr@s5r6.in-berlin.de>2008-12-13 01:43:59 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-12-14 01:13:13 +0100
commit25a41b280083259d05d68f61633194344a1f8a9f (patch)
treee5a9af8f08e35a9bffbf9c61caf3b16ff8289dc9
parent8b1fae4e4200388b64dd88065639413cb3f1051c (diff)
downloadlinux-stericsson-25a41b280083259d05d68f61633194344a1f8a9f.tar.gz
ieee1394: add quirk fix for Freecom HDD
According to http://bugzilla.kernel.org/show_bug.cgi?id=12206, Freecom FireWire Hard Drive 1TB reports max_rom=2 but returns garbage if block read requests are used to read the config ROM. Force max_rom=0 to limit them to quadlet read requests. Reported-by: Christian Mueller <cm1@mumac.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
-rw-r--r--drivers/ieee1394/nodemgr.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index d333ae22459c..79ef5fd928ae 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -115,8 +115,14 @@ static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
return error;
}
+#define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db
+
static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
{
+ /* Freecom FireWire Hard Drive firmware bug */
+ if (be32_to_cpu(bus_info_data[3]) >> 8 == OUI_FREECOM_TECHNOLOGIES_GMBH)
+ return 0;
+
return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
}